If your destination is east of Village Center Drive (shown in blue), use Yorba Linda Boulevard/Weir Canyon Road from the Riverside Freeway to get to and from your destination. If your destination is west of Village Center, use Imperial Highway to the greatest extent possible to get to and from your destination.
Less common causes. There are also a number of other, less common causes of mouth ulcers. Some of these are listed below: 1  Herpes simplex infection: a highly contagious virus, also known as the 'cold sore virus', which can cause cold sores on the mouth and the genitals.
Luckily most mouth ulcers are easy to treat. Mouth ulcers are usually temporary, healing on their own within 1 to 2 weeks, and harmless (except for pain and inconvenience). If you get mouth ulcers that last longer than 3 weeks, or they recur regularly, you should seek medical attention as it may be a sign of a more serious problem. Causes of Mouth Ulcers. Mouth ulcers are not contagious.